Wifi sync always fails on 30.18

Wifi sync always fails on the Edge 840 since the 30.18 update.

Worked fine before the 30.18 update. Connects successfully to the network (WPA 2). But then it gets stuck on "Transfer in Progress" for a while, then fails silently and no activity is transferred. Bluetooth sync still works fine.

Anyone else has this issue? Any ideas on things to try? I've removed and added my network back, but wifi sync still fails 100% of the time.